It's a brown lace weaver (Amaurobius species) common on the exterior of houses, but seen indoors too (the most common spiders I se in my own home).

A bite is extremely unlikey, but they are capable of doing so, soreness & swelling for a couple of days? I don't particularly like them, but I wouldn't go so far as to declare them "a problem", they don't seem particularly phased by humans, but equally they don't seem to go looking for conflict. My resident population of Pholcus phalangioides seems pretty adept at keeping the Amaurobius species under control, so maybe not disturb any Pholcus that you have?